A woman died Friday evening when she was struck by an express MTA bus in downtown Manhattan and dragged six blocks, cops said.

The victim was hit by the rear wheel of the QM7, bus which was carrying about a dozen passengers, at the Staten Island Ferry Terminal at 5:49 p.m. and got pulled under.

Roger Wentworth has been on the job for nearly 40 years.

The driver, Roger Wentworth, who has been on the job for nearly 40 years, headed north unaware of what had happened — until a pedestrian frantically caught his attention at Trinity Place and Exchange Alley, according to police.

The accident left gruesome scenes. “There were body parts coming out the back of the bus,” said witness William Stock.

The QM7 runs from downtown Manhattan to Glen Oaks, Queens.

The president of the Transport Workers Union called the accident a “tragedy” and said the bus operator was distraught.

“Our hearts go out to the victim,” said union president John Samuel­sen. “This is a veteran bus operator with a good record. He’s an emotional mess.”